2. Why can't a machine be 100 percent efficient? *
2 points
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3. Suppose you exert 15 N on a machine, and the machine exerts 300 N on another object. What is the machine's mechanical advantage? *
1 point
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4. For the machine described in question 3, how does the distance through which the output force is exerted differ from the distance through which the input force is exerted? *
2 points
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